| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 5 | |
| #2 | Switzerland | 3 | |
| #3 | Spain | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Alloys | |
| #2 | Separation | |
| #3 | Non-metallic elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frischer Hermann | 8 |
| #2 | Hermann Frischer | 3 |
| #3 | Drees Michael | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ES126884A1 | Process for the regeneration of residual acids from the refining of mineral oils, tar and the like. | |
| GB191507098A | Improvements in or relating to the Recovery of Volatile Solvents Diluted with Air or other Gases. | |
| GB191507099A | Improvements in or relating to Apparatus for the Manufacture of Volatile Acids from their Salts. | |
| CA325652A | Structural material |